Relationship of the trans-Challis fault system in central Idaho to Eocene and Basin and Range extensions

Abstract

Research Article| June 01, 1986 Relationship of the trans-Challis fault system in central Idaho to Eocene and Basin and Range extensions Earl H. Bennett Earl H. Bennett 1Idaho Geological Survey, Room 332 Morrill Hall, University of Idaho, Moscow, Idaho 83843 Search for other works by this author on: GSW Google Scholar Author and Article Information Earl H. Bennett 1Idaho Geological Survey, Room 332 Morrill Hall, University of Idaho, Moscow, Idaho 83843 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1986) 14 (6): 481–484. https://doi.org/10.1130/0091-7613(1986)14<481:ROTTFS>2.0.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Earl H. Bennett; Relationship of the trans-Challis fault system in central Idaho to Eocene and Basin and Range extensions. Geology 1986;; 14 (6): 481–484. doi: https://doi.org/10.1130/0091-7613(1986)14<481:ROTTFS>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The trans-Challis fault system (TCFS) is a new structural province in central Idaho mapped during the Challis CUSMAP program conducted by the U.S. Geological Survey. The TCFS contains numerous northeast-trending faults, several eruptive centers for the Challis Volcanics, and many precious metal deposits. Major movement occurred in the fault system during Eocene extension that affected the area from the Snake River Plain north into British Columbia.The eastern Snake River Plain is the southern boundary of Eocene extension, and in Idaho the Lewis and Clark line is the northern boundary. The eastern Snake River Plain was "welded" together by passage of the plain over the Yellowstone hotspot. Younger Basin and Range faults were then able to extend across the plain and now terminate at the next major Eocene crustal break north of the plain, the TCFS. The TCFS is an extensional feature equal in importance to the Lewis and Clark zone and the eastern Snake River Plain and should be considered in Tertiary reconstructions for the Pacific Northwest. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.